package com.utils.widget;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.util.AttributeSet;
import android.widget.ImageView;

/**
 * * 自定义的圆形ImageView，可以直接当组件在布局中使用。
 *
 * @author caizhiming
 */
public class XCRoundImageView extends ImageView {
	 private Paint paint;

	    public XCRoundImageView(Context context) {
	        this(context, null);
	    }

	    public XCRoundImageView(Context context, AttributeSet attrs) {
	        this(context, attrs, 0);
	    }

	    public XCRoundImageView(Context context, AttributeSet attrs, int defStyle) {
	        super(context, attrs, defStyle);
	        paint = new Paint();
	    }

	    /**
	     * * 绘制圆形图片
	     *
	     * @author caizhiming
	     */
	    @Override
	    protected void onDraw(Canvas canvas) {

	        Drawable drawable = getDrawable();
	        if (null != drawable) {
	            Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
	            Bitmap b = getCircleBitmap(bitmap, 14);
	            final Rect rectSrc = new Rect(0, 0, b.getWidth(), b.getHeight());
	            final Rect rectDest = new Rect(0, 0, getWidth(), getHeight());
	            paint.reset();
	            canvas.drawBitmap(b, rectSrc, rectDest, paint);

	        } else {
	            super.onDraw(canvas);
	        }
	    }

	    /**
	     * * 获取圆形图片方法
	     *
	     * @param bitmap
	     * @param pixels
	     * @return Bitmap
	     * @author caizhiming
	     */
	    private Bitmap getCircleBitmap(Bitmap bitmap, int pixels) {
	        Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
	                bitmap.getHeight(), Config.ARGB_8888);
	        Canvas canvas = new Canvas(output);
	        final int color = 0xff424242;
	        final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
	        paint.setAntiAlias(true);
	        canvas.drawARGB(0, 0, 0, 0);
	        paint.setColor(color);
	        int x = bitmap.getWidth();

	        canvas.drawCircle(x / 2, x / 2, x / 2, paint);
	        paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
	        canvas.drawBitmap(bitmap, rect, rect, paint);
	        return output;

	    }
}
